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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 443 · 40 questions
TalentJR

The fast method (Keep a running total): Start with the first number. Add the tens of the next number, then its ones. Keep going until the list ends — only one total in your head at a time.

NameDateTime takenScore ___ / 40
  1. 1.61 + 51 + 25 + 66 =
  2. 2.59 + 17 + 34 + 80 =
  3. 3.51 + 19 + 18 + 17 =
  4. 4.48 + 24 + 39 + 22 =
  5. 5.46 + 89 + 82 + 21 =
  6. 6.83 + 30 + 15 + 51 =
  7. 7.69 + 47 + 20 + 78 =
  8. 8.30 + 33 + 40 + 71 =
  9. 9.22 + 14 + 48 + 30 =
  10. 10.29 + 63 + 77 + 70 =
  11. 11.74 + 33 + 42 + 84 =
  12. 12.43 + 44 + 18 + 89 =
  13. 13.76 + 30 + 67 + 16 =
  14. 14.66 + 22 + 42 + 25 =
  15. 15.36 + 26 + 19 + 15 =
  16. 16.71 + 18 + 20 + 45 =
  17. 17.16 + 12 + 41 + 49 =
  18. 18.84 + 66 + 38 + 67 =
  19. 19.51 + 14 + 25 + 77 =
  20. 20.18 + 62 + 50 + 32 =
  21. 21.12 + 71 + 55 + 41 =
  22. 22.53 + 78 + 49 + 13 =
  23. 23.37 + 89 + 75 + 38 =
  24. 24.72 + 24 + 74 + 41 =
  25. 25.76 + 21 + 86 + 43 =
  26. 26.85 + 78 + 27 + 41 =
  27. 27.73 + 40 + 14 + 71 =
  28. 28.78 + 83 + 86 + 35 =
  29. 29.19 + 44 + 28 + 24 =
  30. 30.22 + 74 + 21 + 17 =
  31. 31.60 + 80 + 20 + 46 =
  32. 32.65 + 76 + 88 + 28 =
  33. 33.71 + 73 + 33 + 15 =
  34. 34.57 + 33 + 81 + 79 =
  35. 35.63 + 80 + 54 + 30 =
  36. 36.17 + 25 + 57 + 32 =
  37. 37.29 + 77 + 14 + 85 =
  38. 38.88 + 15 + 72 + 69 =
  39. 39.18 + 58 + 75 + 33 =
  40. 40.83 + 11 + 55 + 37 =

Answer key

  1. 203
  2. 190
  3. 105
  4. 133
  5. 238
  6. 179
  7. 214
  8. 174
  9. 114
  10. 239
  11. 233
  12. 194
  13. 189
  14. 155
  15. 96
  16. 154
  17. 118
  18. 255
  19. 167
  20. 162
  21. 179
  22. 193
  23. 239
  24. 211
  25. 226
  26. 231
  27. 198
  28. 282
  29. 115
  30. 134
  31. 206
  32. 257
  33. 192
  34. 250
  35. 227
  36. 131
  37. 205
  38. 244
  39. 184
  40. 186

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